code: def testConstructionNamed(self):
      with self.cached_session():
          logits, targets, pos_weight, _ = self._Inputs()
          loss = nn_impl.weighted_cross_entropy_with_logits(
              targets=targets,
              logits=logits,
              pos_weight=pos_weight,
              name="mybce",
          )
      self.assertEqual("mybce", loss.op.name)
  
imports: import math
  import numpy
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import gradient_checker
  from tensorflow.python.ops import gradients_impl
  from tensorflow.python.ops import nn_impl
  import tensorflow.python.ops.nn_grad
  from tensorflow.python.platform import test
label_desc: Use image node_id 3 for calling the WeightedCrossEntropyTest obj's underlying member method code with example usage: obj.testConstructionNamed() without return types